Favorinus

If an article by Retief and Cilliers (2003) is as thorough as it seems, then we don't have much evidence to go on beyond the statements of Polemon and Philostratus. There are a few statements from others describing his physical appearance and possible sexual functions but nothing decisive. Retief and Cilliers conclude that it is "perhaps more likely" then not that Favorinus had a congenital intersex condition. However:

We would suggest that it is impossible to differentiate further, with the information at our disposal. Even in modern times sophisticated cytological and biochemical investigations are needed in the differential diagnosis of these rare conditions presenting as male hypogonadism.

They dismiss the likelihood of certain conditions like Kkeinfelter's and agree with Mason (1979) that there is "a strong possibility" that he had Reifenstein's syndrome, also know as Partial Androgen Insensitivity Syndrome (PAIS)

These patients characteristically have underdeveloped external genitalia, undescended testes (Polemon’s remark about Favorinus being born without testes, refers), decreased muscle mass, gynaecomastia and hair growth typical of androgen deficiency. At birth they present with variable degrees of apparent feminisation of the external genitalia, which could explain Philostratos’ claim that he was hermaphroditic.

So no, the evidence you're hoping for doesn't exist and is unlikely to turn up.